package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    /*
     *t统计制定时间区域内的营业额数据
     * */
    @Override
    public TurnoverReportVO getTurnoverStatics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的营业额
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();
            map.put("beginTime",beginTime);
            map.put("endTime",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            //如果营业额为空，返回的是空字符串,我们需要的是数字0.0
            turnover=turnover==null?0:turnover;
            turnoverList.add(turnover);
        }
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }


    /*
     *t统计制定时间区域内的用户数据
     * */
    @Override
    public UserReportVO getUserStatics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的新增用户数量
        List<Integer> newUserList=new ArrayList<>();
        //存放总用户数量
        List<Integer> totalUserList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();
            map.put("end",beginTime);
            Integer totalUser=userMapper.countByMap(map);
            map.put("begin",endTime);
            Integer newUser=  userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /*统计指定时间内的订单数据*/
    @Override
    public OrderReportVO getOrderStatics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天订单总数
        List<Integer> orderCountList=new ArrayList<>();
        //存放每天有效订单总数
        List<Integer> validCountList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validCountList.add(validOrderCount);
        }
        //计算订单时间期间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算订单时间期间内的有效订单数量
        Integer validOrderCount = validCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate=0.0;
        if(totalOrderCount!=0){
            orderCompletionRate=  validOrderCount.doubleValue()/totalOrderCount;
        }
        return  OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /*
    * 根据条件统计订单数量
    * */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status) {
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }

    /*
    * 统计指定时间区域的销量排名前10
    *
    * */
    @Override
    public SalesTop10ReportVO getSalesTop10Statics(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList  = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /*导出运营数据报表*/
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //1.通过查询数据库，获取营业数据--查询最近30天的运营数据
        LocalDate dateBegin=LocalDate.now().minusDays(30);//往前倒退30天
        LocalDate dateEnd=LocalDate.now().minusDays(1);
        LocalDateTime begin = LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime end = LocalDateTime.of(dateEnd, LocalTime.MAX);
        BusinessDataVO businessData = workspaceService.getBusinessData(begin, end);
        //2.通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel=new XSSFWorkbook(in);
            //获取表格文件的sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间"+dateBegin+"至"+dateEnd);
            //填充数据--第四行数据
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            //填充数据--第五行数据
             row= sheet.getRow(4);
             row.getCell(2).setCellValue(businessData.getValidOrderCount());
             row.getCell(4).setCellValue(businessData.getUnitPrice());

             //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());
            }


             //3.通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
